Cambridge SoundWorks Powered Subwoofer II Installation And Operating Instructions Manual - page 9
nals of your main speakers
instead of the amplifier or
receiver’s speaker output termi-
nals.
Be sure the speaker wire con-
nects the positive (+) terminals of
the subwoofer to the positive (+)
terminals of the amplifier or
receiver (and similarly connects
the negative (–) terminals to-
gether). All two-conductor speaker
cable is coded along one conduc-
tor by lettering, a stripe or a raised
bead -or- the appearance of the
two conductors differs, usually
one copper and one silver. This
allows you to easily connect the
proper conductor to each terminal.
Connection Method Two:
Connect between a stereo preamp
output and a stereo power amp
input using phono cable “Y”
adapters and standard shielded
stereo cable with phono plugs
(Figure 3). Some receivers and
integrated amplifiers have preamp
outputs and power amp inputs
7
time, such as for several weeks’
vacation, it’s a good idea to turn
the Power switch off.
Note: The 5A fast-blow fuse
protects the amplifier from shorts
across its output, or within its
output stages. If it blows, try
another fuse of exactly the same
value, such as the one supplied in
the accessory pack (do not use
any other value or a slow-blow
fuse). If the fuse blows again,
there may be a defect within the
unit. Do not replace a fuse more
than once. Contact your store or a
Cambridge SoundWorks Audio
Expert as soon as possible for
advice. There are no other fuses
within the
Powered Subwoofer II.
Note: If you connect the
Powered
Subwoofer II to your system using
speaker wires and hear a low-level
hum, turn off both the system and
the subwoofer and reverse the
latter’s AC plug in the outlet.
When you turn the system back
on, the hum should be gone.
that are accessible by removing
jumpers from the back panel.
Connection Method Three:
Connect from a subwoofer output
(on either a receiver, amplifier,
preamp or surround unit) using a
single shielded cable with phono
plugs at each end (Figure 4). The
subwoofer output should be a full-
range mono signal. Check the
specifications for the subwoofer
output. Do not use a subwoofer
output that cuts off the signal
above some arbitrary frequency
(usually between 80 and 200 Hz).
This kind of signal output will
conflict with the operation of the
Powered Subwoofer II’s internal
electronic crossover, resulting in
poor performance. Assuming you
have the necessary full-range
output, use either the left or right
line input of the
Powered
Subwoofer II.
Note: You should connect the
Powered Subwoofer II to your
system using either the line level
inputs or the speaker level inputs–
but not both sets of inputs.
AC Power, On/Off Switch,
and Fuse
After you have finished making
the audio connections, plug the
Powered Subwoofer II’s power cord
into any convenient 120-Volt AC,
60 Hz outlet, and switch the
power “On”.
Note: Do not plug the
Powered
Subwoofer II into a “switched”
outlet on the back of your receiver
or amplifier. The
Powered
Subwoofer II draws enough power
at higher volume levels that it
could damage the outlet’s relay
device.
You can safely leave the
Powered Subwoofer II turned on all
the time, although it does draw a
small amount of power even
when you aren’t playing music.
However, if you are leaving your
system unattended for a long